This is a technique knows as raking a lock.
And let me tell you why you shouldn't be worried by seeing this.

Firstly, the only locks that are this fast and easy to pick are REALLY ****** cheap locks, so unless you bought your locks at the dollar store it will have security pins in it to prevent it being opened this easily.

Secondly, unless you lock is very well oiled and perfectly working this will take a few minutes to do, and it makes quite a loud rasping noise so you would probably hear it.

Thirdly, very very few burglars actually bother to learn how to pick locks.

They just kick down your door or break through a window instead which is much easier and faster. Sleep right knowing that the cops will take at least 10 minutes to show up even if you have a top of the line alarm system.